Cool and all, but I'd rather just have the masterkey setup under an AR. Imagine EOD scenario and you're scouting a perimeter and flush a pheasant or grouse. drop the bird, but gunfire attracts unwanted neighbors, and you've got lots of .223 to take care of trouble instead of just one round. https://www.youtube.com/watch?v=hcML3BsfiF8 my buddy that was in 3rd ID had something like this setup when we were rooming together.